TL;DR

Backend Developer (Ecommerce): Evolving real-time events ingestion backend, one of Criteo’s largest data pipelines, with an accent on scalability, low latency, and reliability. Focus on designing and implementing back-end features with strong testing and observability, helping build web applications, and promoting a strong engineering culture focused on quality and modern CI/CD.

Location: Hybrid in Bucharest, Romania

Company

Criteo is a leader in commerce media, helping brands, agencies, and publishers create meaningful consumer connections through AI-powered advertising solutions.

What you will do

  • Build new capabilities and maintain high-throughput events collection back-end.
  • Partner with Product and Program to deliver fit-for-purpose architecture and reusable components across platforms.
  • Design, implement, and ship back-end features end-to-end with strong testing and observability.
  • Help build web applications when needed, including AI-assisted flows for configuration, validation, and troubleshooting.
  • Collaborate with multi-cultural R&D teams and Internal IT to ensure robust integrations between client-facing apps and Criteo systems.
  • Own stability, usability, and continuous delivery, raising the bar on reliability and developer experience.

Requirements

  • Experience building, maintaining, and evolving large‑scale applications.
  • Care deeply about high‑throughput systems and prioritize reliability, performance, and scalability.
  • Skilled at making complex problems simple and solvable.
  • Stay curious about new technologies and adopt proven design and engineering best practices.
  • Bring a can‑do, collaborative mindset and approach problems with positivity and ownership.
  • Experience in Agile teams and are passionate about shipping high‑quality, well‑tested code.

Nice to have

  • Experience in full‑stack development with modern JavaScript and in building web services in C#, Java, or Python.
  • Contribute to Product and UX discussions, turning customer needs into simple, intuitive solutions, and you apply AI where it clearly improves outcomes.

Culture & Benefits

  • Hybrid model blends home with in-office experiences.
  • Learning, mentorship & career development programs.
  • Health benefits, wellness perks & mental health support.
  • Diverse, inclusive, and globally connected team.
  • Attractive salary, with performance-based rewards and family-friendly policies, plus the potential for equity depending on role and level.